Dynamic stiffness method for free vibrations analysis of partial fluid-filled orthotropic circular cylindrical shells

Tran Ich Thinh, Nguyen Manh Cuong, Vu Quoc Hien

Abstract


Free vibrations of partial fluid-filled orthotropic circular cylindrical shells are investigated using the Dynamic Stiffness Method (DSM) or Continuous Element Method (CEM) based on theFirst Order Shear Deformation Theory (FSDT) and non-viscous incompressible fluid equations. Numerical examples are given for analyzing natural frequencies and harmonic responses of cylindrical shells partially and completely filled with fluid under various boundary conditions. The vibration frequencies for different filling ratios of cylindrical shells are obtained and compared with existing experimental and theoretical results which indicate that the fluid filling can reduce significantly the natural frequencies of studiedcylindrical shells. Detailed parametric analysis is carried out to show the effects of some geometrical and material parameters on the natural frequencies of orthotropic cylindrical shells. The advantages of this current solution consist in fast convergence, low computational cost and high precision validating for all frequency ranges.

Keywords


Free vibration; continuous element method; dynamic stiffness method; orthotropic cylindrical shell; fluid-shell interaction

Full Text:

PDF


DOI: https://doi.org/10.15625/0866-7136/37/1/5508

Refbacks

  • There are currently no refbacks.


Copyright (c) 2015 Vietnam Academy of Science and Technology

 

                      

Editorial Office of Vietnam Journal of Mechanics

3rd Floor, A16 Building, 18B Hoang Quoc Viet Street, Cau Giay District, Hanoi, Vietnam

Tel: (+84) 24 3791 7103

Email: vjmech@vjs.ac.vn